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General Organic Chemistry I: Electronic Effects
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Aromaticity, antiaromaticity and Huckel rule
NEET level
Single correct option
Difficulty 1 of 3
g1121
Cyclobutadiene is
A
aromatic because it has two double bonds
B
antiaromatic
C
aromatic
D
non-aromatic because it is non-planar and not conjugated
Answer: B
Cyclobutadiene is a planar, cyclic, conjugated system with 4 pi electrons (
4
n
,
n
=
1
). Such systems are antiaromatic and unstable.
Practice General Organic Chemistry I: Electronic Effects
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